<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <title>Document</title>
    <style media="screen">
        .box1 {
            height: 200px;
            background-color: green;
        }

        .box2 {
            height: 200px;
            background-color: red;
        }
    </style>
    <link rel="stylesheet" href="https://cdn.staticfile.org/dragula/3.7.2/dragula.min.css">
</head>
<body>
    <div id="containers">
        <div class="box1"></div>
        <div class="box2"></div>
    </div>
    <script src="https://cdn.staticfile.org/dragula/3.7.2/dragula.min.js" charset="utf-8"></script>
    <script type="text/javascript">
        var drake = dragula([document.querySelector('#containers')])
    </script>
</body>
</html>